/ Dictionary / Index P polyarchy: Meaning and Definition of Find definitions for: pol•y•ar•chy Pronunciation: (pol'ē-är"kē), [key] — pl. -chies. a form of government in which power is vested in three or more persons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyanthus polyarteritis Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language